It's the Jewish marriage contract.
Ketubah
A ketubah is a marriage contract. The ketubah is like a marriage license from the state, but it is made up for Jewish couples. It has elements of a prenup in it, and the rights and obligations of the man AND the wife.
As I can see no reason to think either Susan Fontanarossa or Domenico Columbo were Jewish, so they would not have had to sign a Jewish prenuptial agreement (Ketubah)
A ketubah is a sort of Jewish marriage contract, designed to protect the wife financially in the event of a divorce or her husband's passing. Custom ketubahs are available at a variety of places.
A. Leo Levin has written: 'New provisions in the ketubah' -- subject(s): Divorce (Jewish law), Ketubah, Marriage (Jewish law) 'Dispatch and delay' -- subject(s): Administration of Justice, Court congestion and delay
It is a tradition in the Jewish Religion. :)
A shadchan is one who arranges shidduchim (marriages).
The easiest way to confirm you're Jewish if you were born Jewish, is to use your parents' ketubah (marriage contract). If that's not available, or there wasn't one, it takes a fair bit of research. You might have to find your mother's parents' ketubah, things like Jewish gravestones showing that your mother's side was Jewish can be used as proof. There are organizations and Rabbis who specialise in this type of area, try Googling the subject.
There is the Ketubah which is signed by the husband and the wife at the wedding. The Ketubah is basically a Jewish declaration that you are husband and wife, and that you promise to be faithful, kind, etc., to each other. It is not a legal document. But if you are religious, under Jewish Law, they take it very seriously. There is actually a form of a court that is make up of rabbi to settle issues in the community, but I digress....
ketubah = כתובה
Jewish tradition was preserved by the Jewish Prophets, Sages, Torah-commentators and codifiers. Jewish tradition is preserved by learning and keeping the Torah.
Its there tradition and they wanty to fallow off there ancestros religion thx jodie